Sensory deprivation float tank + cannabis edible

I've really enjoyed reading trip reports since joining this community last week, and while I haven't yet tried DMT, I figured to contribute something I'd share a few of my past experiences with other substances that stand out to me. This one is from the first time I ever "hallucinated" anything - now that I've been learning about DMT I've been finding myself revisiting this experience more, questioning a little what exactly happened. It was 2015, I was 30 years old and hadn't tried any psychedelics yet, and had only even used weed a few times - maybe 5-10 times over the previous year, usually via edibles. I had also just learned about sensory deprivation float tanks (some of you probably know Joe Rogan advocates for these as a way to experience something not entirely dissimilar to something psychedelic). Basically you lie in a dark tank with water salty enough to make you float without effort, with no stimuli (lights and music are optional for a less "deprived" experience), and observe what happens when all that's left is your mind. After some time you start to not even feel the water anymore because floating takes place so automatically, so you're essentially deprived of all sensation. Some might use it differently, but for me it's almost the opposite of meditation - with meditation I'm looking to reduce my thinking; here I'm looking to follow where it goes. Anyway I took a strong edible before floating, and I think being such a weed novice also exacerbated its effect. As time went on I started to "trip" more than I thought would happen with just weed, both mentally and visually. I don't remember all the details, but remember seeing visual depictions of something like an obstacle course full of marbles, where groups of marbles would roll out of some containers into others and take new shapes as they moved through the course, in a dramatic and impressive way. It sounds (even to me) crazy but I felt like it was providing an explanation of how human evolution fits into some bigger picture, in a surprisingly complex way that I had a thought "wow it's amazing how much sense this makes, I don't think my brain could typically perceive this, and I know I won't be able to recall the specifics when I'm out of here." I don't remember much else of what I visualized in there, as it was a long while back, but that's the part that stood out to me. Even after the experience I remember thinking how weird it was that somehow my brain felt like that made complete sense at the time (given with my "normal" mind it made no sense that marbles could explain evolution or that something like that could contain so much complexity). Anyway, even now I'm not sure that wasn't just nonsensical hallucinating, but as I've since learned more about psychedelics expanding perception rather than only introducing "false" hallucinations, I've revisited this experience with a newly open mind. I've been pretty frequently stoned in the years since then, including several times in float tanks, and never had anything close to that experience. My best guess at the reason is the combination of 1) the relative newness of cannabis to my brain and 2) the sensory deprivation - and maybe the newness of that too as it was my first time floating.